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Re: m68k bootstrap failure

From: Gunther Nikl <gni at gecko dot de>
To: Zack Weinberg <zack at codesourcery dot com>
Cc: Bernardo Innocenti <bernie at develer dot com>, GCC Mailing List <gcc at gcc dot gnu dot org>
Date: Tue, 28 Oct 2003 15:31:52 +0100
Subject: Re: m68k bootstrap failure
References: <3F9C505B.6080703@develer.com> <20031027171359.GA11774@lorien.int.gecko.de>

Hello!

Your patch http://gcc.gnu.org/ml/gcc-patches/2003-10/msg02274.html changing
genmodes.c/machmode.h breaks m68k when using FPU mode. A testcase can be
found here: http://gcc.gnu.org/ml/gcc/2003-10/msg01317.html.
Compiling the test case for m68k-linux with ./xgcc -B./ -S yields:

--cut--
foo.c: In function `foo':

foo.c:4: error: unable to generate reloads for:
(call_insn 14 13 15 2 (set (reg:DF %fp0)
        (call (mem:QI (symbol_ref:SI ("bar") [flags 0x41] <function_decl 0x285b74a4 bar>) [0 S1 A8])
            (const_int 8 [0x8]))) 353 {*m68k.md:6819} (nil)
    (nil)
    (nil))
../../2.c:4: internal compiler error: in find_reloads, at reload.c:3647
--cut--

Other m68k-targets fail in reload.c/subst_reloads. I don't know whether this
is a backend bug or a bug in your patch.

Gunther

Follow-Ups:
- [PATCH] Re: m68k bootstrap failure
  - From: Zack Weinberg

References:
- m68k bootstrap failure
  - From: Bernardo Innocenti
- Re: m68k bootstrap failure
  - From: Gunther Nikl

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